Nicomachean Ethics

We have next to speak of Equity and the Equitable, that is to say, of the relations of Equity to Justice and the Equitable to the Just; for when we look into the matter the two do not appear identical nor yet different in kind; and we sometimes commend the Equitable and the man who embodies it in his actions, so that by way of praise we commonly transfer the term also to other acts instead of the term good, thus showing that the more Equitable a thing is the better it is: at other times following a certain train of reasoning we arrive at a difficulty, in that the Equitable though distinct from the Just is yet praiseworthy; it seems to follow either that the Just is not good or the Equitable not Just, since they are by hypothesis different; or if both are good then they are identical.

This is a tolerably fair statement of the difficulty which on these grounds arises in respect of the Equitable; but, in fact, all these may be reconciled and really involve no contradiction: for the Equitable is Just, being also better than one form of Just, but is not better than the Just as though it were different from it in kind: Just and Equitable then are identical, and, both being good, the Equitable is the better of the two.

What causes the difficulty is this; the Equitable is Just, but not the Just which is in accordance with written law, being in fact a correction of that kind of Just. And the account of this is, that every law is necessarily universal while there are some things which it is not possible to speak of rightly in any universal or general statement. Where then there is a necessity for general statement, while a general statement cannot apply rightly to all cases, the law takes the generality of cases, being fully aware of the error thus involved; and rightly too notwithstanding, because the fault is not in the law, or in the framer of the law, but is inherent in the nature of the thing, because the matter of all action is necessarily such.

When then the law has spoken in general terms, and there arises a case of exception to the general rule, it is proper, in so far as the lawgiver omits the case and by reason of his universality of statement is wrong, to set right the omission by ruling it as the lawgiver himself would rule were he there present, and would have provided by law had he foreseen the case would arise. And so the Equitable is Just but better than one form of Just; I do not mean the abstract Just but the error which arises out of the universality of statement: and this is the nature of the Equitable, “a correction of Law, where Law is defective by reason of its universality.”

This is the reason why not all things are according to law, because there are things about which it is simply impossible to lay down a law, and so we want special enactments for particular cases. For to speak generally, the rule of the undefined must be itself undefined also, just as the rule to measure Lesbian building is made of lead: for this rule shifts according to the form of each stone and the special enactment according to the facts of the case in question.

It is clear then what the Equitable is; namely that it is Just but better than one form of Just: and hence it appears too who the Equitable man is: he is one who has a tendency to choose and carry out these principles, and who is not apt to press the letter of the law on the worse side but content to waive his strict claims though backed by the law: and this moral state is Equity, being a species of Justice, not a different moral state from Justice.